theset bac in the senate they are continuing to push. >> it's the first line of defense. >> reporter: thompson discussed a new bill requiring more extensive background checks. >>> did it mean more criminals witness ever get a gun? no. does it mean that the mentally ill will never get guns snow no, but it it works. >> reporter: those in attendance supported gun control. >> newtown lit a fire under americans. i don't think anyone is going to give up. >> reporter: this man argued tougher gun control would not have prevent the shooting in newtown, connecticut. >> here in california if i want to protect myself ray firearm, there are so many things in the way for me to be able to protect myself. that is so unconstitutional. >> reporter: and many booed after he suggested arming teachers to protect schools thompson says it's up to house speaker john boehner whether the issue of gun control will be taken up in the house. in palo alto cara liu ktvu . >> how events of this week motivated those in san francisco to get prepared. >>> an avalanche in colorado kills a group of look at them kids.